09442-2746 FIN 326 (The Ant)
09h 44m 12.13s -27° 46' 10.4" P.A. 346.00 sep 0.1 mag 5.30,6.18 Sp F7V dist. 104.06 pc (339.44 l.y.)
Coord 2000 |
09442-2746 |
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Discov num |
FIN 326 |
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Comp |
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Coord arcsec 2000 |
09 44 12.13 -27 46 10.4 |
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Date first |
1952 |
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Date last |
2021 |
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Obs |
56 |
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Pa first |
251 |
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Pa last |
345.7 |
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P.A. Now (θ) |
312.3° |
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Sep first |
0.1 |
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Sep last |
0.062 |
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Sep. Now (ρ) |
0.064" |
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Mag pri |
5.30 |
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Mag sec |
6.18 |
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delta mag (ΔM) |
0.88 |
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Spectral class |
F7V (yellow-white) |
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Pri motion ra |
-047 |
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Sec motion ra |
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Pri motion dec |
+035 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
The Ant |
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Constellation |
Antlia |
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SAO |
177908 |
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HIP |
47758 |
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Tycho2 |
6610-02315-1 |
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Gaia DR2 |
5657043095060156416 |
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HD |
84367 |
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HR |
3871 |
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GC |
13425 |
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GL |
Gl 366.1A |
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CD |
CD-27 6881 |
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CP |
CP-27 3851 |
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Bayer |
Theta Antliae |
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Bayer name |
The Ant |
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FK5 |
366 |
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Distance |
104.06 |
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Distance ly |
339.44 |
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Bayer greek |
θ Ant |
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ORBITAL ELEMENTS
Period (P) | 18.39y | ± 0.08 |
Periastron (T) | 2020.92y | ± 0.08 |
Semi-major axis (a) | 0.1075a | ± 0.0012 |
Eccentricity (e) | 0.506 | ± 0.015 |
Inclination (i) | 126.8° | ± 0.9 |
Longitude of periastron (ω) | 138.2° | ± 2.6 |
Node (Ω) | 175° | ± 1.8 |
Notes | n | |
Reference | Tok2020e | |
Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
156.7 |
0.089 |
2001 |
133.5 |
0.056 |
2002 |
63.8 |
0.035 |
2003 |
1.3 |
0.055 |
2004 |
329.6 |
0.064 |
2005 |
301.3 |
0.065 |
2006 |
274.6 |
0.069 |
2007 |
252.8 |
0.079 |
2008 |
236.6 |
0.092 |
2009 |
224.6 |
0.106 |
2010 |
215.4 |
0.119 |
2011 |
207.9 |
0.130 |
2012 |
201.5 |
0.139 |
2013 |
195.7 |
0.144 |
2014 |
190.2 |
0.146 |
2015 |
184.6 |
0.143 |
2016 |
178.6 |
0.135 |
2017 |
171.5 |
0.121 |
2018 |
161.9 |
0.099 |
2019 |
145.2 |
0.069 |
2020 |
99.1 |
0.038 |
2021 |
18.7 |
0.047 |
2022 |
341.0 |
0.062 |
2023 |
312.3 |
0.064 |
2024 |
284.6 |
0.066 |
2025 |
260.6 |
0.074 |
2026 |
242.3 |
0.087 |
2027 |
228.9 |
0.101 |
2028 |
218.8 |
0.114 |
2029 |
210.7 |
0.126 |
2030 |
203.9 |
0.136 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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